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Biofilms01:29

Biofilms

Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic01:26

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Healthcare-associated infections (HAIs) occur in a healthcare facility while a person receives care for another ailment. This category also includes work-related infections among healthcare staff.
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Infection01:20

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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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Essential infection prevention measures are based on the knowledge of the infection chain, the modes of transmission in healthcare settings, and the use of the best practices in all healthcare settings. Compulsory public reporting of healthcare-associated infection rates is needed to allow individuals and the community to make informed choices regarding selecting a healthcare facility.
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Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat
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Infective Endocarditis by Biofilm-Producing Methicillin-Resistant Staphylococcus aureus-Pathogenesis, Diagnosis, and

Ashlesha Kaushik1, Helen Kest2, Mangla Sood3

  • 1Division of Pediatric Infectious Diseases, Unity Point Health at St. Luke's Regional Medical Center and University of Iowa Carver College of Medicine, 2720 Stone Park Blvd, Sioux City, IA 51104, USA.

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Infective endocarditis caused by Staphylococcus aureus (MRSA) is challenging due to biofilms. New therapies are emerging to combat this drug-resistant biofilm formation and improve patient outcomes.

Keywords:
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Area of Science:

  • Infectious Diseases
  • Cardiology
  • Microbiology

Background:

  • Infective endocarditis (IE) is a serious infection with rising global incidence.
  • Staphylococcus aureus, particularly methicillin-resistant strains (MRSA), is a primary cause of IE.
  • Biofilm formation by S. aureus is key to its pathogenesis, causing antimicrobial resistance and complicating treatment, especially with prosthetic materials.

Purpose of the Study:

  • To review the pathogenesis of biofilm-related MRSA IE.
  • To outline current management guidelines for MRSA IE.
  • To explore emerging therapeutic strategies for biofilm-associated resistance.

Main Methods:

  • Review of current literature on MRSA IE pathogenesis and treatment.
  • Analysis of diagnostic criteria, including updated Modified Duke Criteria and advanced imaging (PET/CT).
  • Evaluation of established and novel therapeutic approaches, including antimicrobial therapy, surgery, and emerging strategies.

Main Results:

  • Biofilms protect MRSA from antibiotics and immune responses, leading to persistent infections.
  • Diagnosis is aided by updated criteria and imaging like PET/CT.
  • Treatment involves prolonged antibiotics (vancomycin, daptomycin), potential surgery, and controversial anticoagulation.
  • Emerging therapies like bacteriophage therapy, AMPs, QSIs, and nanoparticle systems show promise.

Conclusions:

  • Biofilm-associated resistance in MRSA IE presents significant challenges.
  • Current management requires aggressive antimicrobial and often surgical intervention.
  • Novel therapeutic strategies are crucial for overcoming resistance and improving outcomes in biofilm-related MRSA IE.